The server you are trying to access is using an authentication protocol not supported by this version of Office.

since windows update 1511, or since i installed the new office 2016 apps in my office 365 for small business environment, i got this message more and more frequently when my laptop starts, or tries to access the onedrive for business server using the groove.exe program. it was getting annoying. it lasts for weeks now. i tried several entries in the communities and found nothing helpful. i removed and reinstalled the office 2016 apps three times and nothing changed.

now i managed to identify where groove.exe resides (c:\program files\microsoft office\root\office16) and delete it to cap this nonsense. i know this solution does not help those poor people relying on microsoft and using good old groove under it's onedrive label to store and exchange sensitive data. i used it to share photos with my business colleagues; this no longer works but is not vital. the data once uploaded using groove are still safe on my sharepoint site and remain accessible using the browser. 

i strongly urge microsoft to re-install the authentication protocol used by office 2016 because this issue turns its loyal users away from all its other cloud offerings. moreover, i expect a statement from microsoft why quality controls was not able to prevent this issue. it is a serious violation of the office 365 contracts with microsoft.

[reposted from http://answers.microsoft.com/en-us/office/forum/office_2016-office_storage/the-server-you-are-trying-to-access-is-using-an/613fba96-c432-479a-96e0-6df51a9da4fa]